Pipe-coupling.



No. 647,393. Patented Apr. 10, I900. B; FRANKLIN.

PIPE COUPLING.

(Application filed Jan. (No Model.)

"NITED STATES PATE T OFFICE.

BENJAMIN FRANKLIN, OF BRADFORD, PENNSYLVANIA, ASSIGNOR TO SOLOMON ROBERT DRESSER, OF SAME PLACE.

PIPE-COUPLING,

SPECIFICATION forming part of Letters Patent No. 647,393, dated April 10, 19QO. Application filed January 3,1900. swam. 247. (No model.)

ful Improvements in Pipe-Oouplings ,of which.

the following is a specification.

My inventionrelates to improvements in pipe-couplings, and pertains to acoupling wherein an expansible elastic rubber packing and a compressing-ring is used, the said compressing-ring adapted to expand the rubber in contact with the end of the pipe for making a secure and tight joint, all of which will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a longitudinal sectionalview of my coupling, showing it in position and connecting the adjacent ends of two pipe-sections. Fig. 2 is a perspective View of one end of the coupling, showing my invention in position therein. Fig. 3 is a detached perspective view of the compressing-ring.

The object of my invention is to provide a simple means for effecting a secure and tightjoint connection between the adjacent ends of two pipe-sections without the use of the usual screw-and-thread connection.

Referring now to the drawings, A indicates the body of the coupling, whichis provided at its opposite ends with oppositely-projecting annular flanges B. These flanges B extend from the ends of the body A in a direction parallel with the body A, and the said flanges form a space around the end of the pipe (3 that is to be coupled for the reception of a compressing-ring D and anexpansible packing E, said packing being preferably composed of rubber.

The ends a of the body A constitute annular shoulders, upon which is seated the eX pansible packing E, and the flanges B are.

and tight joint.

under the lugs or projections G extending from the inner faces of the flanges B. For

the purpose of providing means for driving or forcing the compressing-ring around and causing the engagement of the wedge-shaped lugs 12 of the ring and the lugs G of the flanges B, I provide the outer face of the ring D with thelugs or projections 01. By means of these lugs the compressing-ring can be rotated a slight distance, sufficient to cause the lugs b and G to engage and to thereby compress the rubber packing E and force it outward in e11- gagemeut with the pipe 0 for making a secure .To more effectively force the rubber packing in engagement with the pipe which it sur rounds, the inner face a of the ring and the corresponding inner faces of the lugs b are inclined outward by making the ring and the lugs thicker at their outer than at their inner edges, and in this way the rubber is compressed more tightly at its outer than at its inner edge, thus more effectively forcing it inward in tight contact with the pipe surrounded thereby. Attention is also directed to the' factthat the pipe-section C is of a size to about fit the interior ofthe body Aof the" coupling,'andto thus practically form a continuation of the two pipe-sections without and the construction herein shown and described places the compression device and the packing device wholly within the projecting flanges B, which is frequentlya great advantage and also asaving in material.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. A pipe-coupling comprising a coupling member having at its end a surrounding and longitudinally-projecting flange, an elastic packing-rin g resting upon the end of the body, the said longitudinally-projecting flange provided with inwardly-extending lugs removed from and beyond the elastic packing-ring, and a compressing-ring situated Within the said longitudinally-extending flange and at a point inside of the inwardly-extending lugs thereof, the compressing-rin g and the said flanged lugs having engaging Wedge-shaped surfaces, substantially as described.

2. A pipe -coupling comprising a body adapted to receive a pipe-section, the body having at its end a flange projecting longitudinally from the outer edge of the end of the body, an elastic packing-ring seated upon the end of the said body, the said flange provided with inwardly-projecting lugs, and a com pressing-ring situated within the flange andv resting upon the said packing-ring, the compressing-ring having lugs adapted to engage the lugs upon the flange, said lugs having inclined engaging surfaces, substantially as described.

3. A pipe-coupling comprising a body having at its end a longitudinally-extendingsurrounding flange, the flange having inwardlyprojecting lugs situated at a point beyond the end of the body, an elastic packing-ring seated upon the end of the body and inside of said flange-lugs, a compressing-ring situated outside of the said packing and adapted to compress the same, the compressing-ring provided with cam-shaped lugs engaging the lugs upon the flange, substantially as described.

4. A pipe-coupling comprising a body having at its end a longitudinally-extending and surrounding flange, an elastic packing-ring resting upon the end of the body, a compressing ring adapted to compress the said elastic packing, the said flange provided with in- Wardly projectinglugssituated at a point outside of and removed from the packing-ring, the compressing-rin g having its periphery provided with lugs adapted to engage the said flange-lugs, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

BENJAMIN FRANKLIN. Witnesses:

I-IERMANH. NORTH,

WM. L. GRAHAM. 

